<template>
  <section class="loginContainer">
    <div class="loginInner">
      <div class="login_header">
        <h2 class="login_logo">硅谷外卖</h2>
        <div class="login_header_title">
          <a href="javascript:;" :class="{on: isOnShow}" @click="isOnShow = true">短信登录</a>
          <a href="javascript:;" :class="{on: !isOnShow}" @click="isOnShow = false">密码登录</a>
        </div>
      </div>
      <div class="login_content">
        <form>
          <!--短信登陆-->
          <div :class="{on: isOnShow}">
            <section class="login_message">
              <input type="tel" maxlength="11" placeholder="手机号" v-model="phone">
              <button :disabled="!isCountdown" class="get_verification" :class="{right_phone: isCountdown}"
                      @click="getCode">
                {{computeTime > 0 ? `已发送${computeTime}s` : '获取验证码'}}
              </button>
            </section>
            <section class="login_verification">
              <input type="text" maxlength="8" placeholder="验证码" v-model="code">
            </section>
            <section class="login_hint">
              温馨提示：未注册硅谷外卖帐号的手机号，登录时将自动注册，且代表已同意
              <a href="javascript:;">《用户服务协议》</a>
            </section>
          </div>
          <!--密码登陆-->
          <div :class="{on: !isOnShow}">
            <section>
              <section class="login_message">
                <input type="tel" maxlength="11" placeholder="手机号" v-model="name">
              </section>
              <section class="login_verification">
                <input type="text" maxlength="8" placeholder="密码" v-show="isPwdVisit" v-model="pwd">
                <input type="password" maxlength="8" placeholder="密码" v-show="!isPwdVisit" v-model="pwd">
                <div class="switch_button" :class="isPwdVisit ? 'on' : 'off'" @click="isPwdVisit = !isPwdVisit">
                  <div class="switch_circle" :class="{right: isPwdVisit}"></div>
                  <span class="switch_text">{{isPwdVisit ? 'abc': '...'}}</span>
                </div>
              </section>
              <section class="login_message">
                <input type="text" maxlength="11" placeholder="验证码" v-model="pwdCode">
                <img class="get_verification" src="http://localhost:5000/captcha" alt="captcha"
                     ref="svgCaptcha" @click.stop.prevent="getNewCaptcha">
              </section>
            </section>
          </div>
          <button class="login_submit" @click.stop.prevent="handleLogin" v-if="!user.name">登录</button>
        </form>
        <a href="javascript:;" class="about_us">关于我们</a>
      </div>
      <router-link to="/app/profile" class="go_back">
        <i class="iconfont iconzuojiantou"></i>
      </router-link>
    </div>
  </section>
</template>

<script>
  import {mapState} from 'vuex'
  import {sendPhoneCode, loginInfo} from "../../api/api";
  import {MessageBox} from 'mint-ui';

  export default {
    name: "Login",
    data() {
      return {
        isOnShow: true, // true：短信登陆；false：密码登陆
        isPwdVisit: false, // true:密码可见；false：密码不可见
        phone: '', // 手机号
        code: '', // 短信登陆的验证码
        name: '', // 用户名
        pwd: '', // 密码
        pwdCode: '', // 密码登录的验证码
        computeTime: 0, // 验证码发送的计时时间
        isCountdown: false, // 能否点击发送验证码
      }
    },
    watch: {
      phone(val) {
        this.isCountdown = /^1[3456789]\d{9}$/.test(val)
      },
      isOnShow(val) {
        if (val) {
          this.name = ''
          this.pwd = ''
          this.pwdCode = ''
          this.getNewCaptcha() // 更新验证码图片
        } else {
          this.phone = ''
          this.code = ''
        }
      }
    },
    computed: {
      ...mapState({
        user: state => state.user
      })
    },
    methods: {
      //  获取手机验证码
      getCode() {
        this.isCountdown = false
        this.computeTime = 30
        // 调用发送手机验证码接口
        sendPhoneCode({phone: this.phone})
          .then(res => {
            console.log('获取手机验证码', res)
          })
          .catch(err => {
            console.log('发生了什么错误', err)
          })
        const timer = setInterval(() => {
          this.computeTime--
          if (this.computeTime <= 0) {
            clearInterval(timer)
            this.isCountdown = true
          }
        }, 1000)
      },

      //  点击验证码获取到新的验证码图片，只有每次地址刷新或是改变后才会返回新的验证码
      getNewCaptcha() {
        this.$refs.svgCaptcha.src = `http://localhost:5000/captcha?time=${new Date()}`
      },

      //  用户登陆
      handleLogin() {
        let userInfo = {}
        if (this.isOnShow) { // 短信登陆
          if (!this.phone || !this.code) {
            MessageBox.alert('请填写完整的用户信息')
            return
          }
          userInfo = {
            phone: this.phone.trim(),
            code: this.code.trim(),
          }
        } else { // 密码登陆
          if (!this.name || !this.pwd || !this.pwdCode) {
            MessageBox.alert('请填写完整的用户信息')
            return
          }
          userInfo = {
            name: this.name.trim(),
            pwd: this.pwd.trim(),
            pwdCode: this.pwdCode.toLocaleLowerCase().trim()
          }
        }
        loginInfo(userInfo)
          .then(res => {
            const result = res.data
            if (result.code_err !== 0) {
              MessageBox.alert(`${result.msg}`).then(() => {
                this.code = ''
                this.pwdCode = ''
                this.pwd = ''
              })
            } else {
              sessionStorage.setItem('id', result.data._id)
              this.$router.push({path: '/app/profile'})
              this.$store.dispatch('receive_userinfo', result.data)
            }
          })
      },
    }
  }
</script>

<style lang='stylus' rel='stylesheet/stylus' scoped>
  @import "../../common/stylus/mixins.styl"
  .loginContainer
    width 100%
    height 100%
    background #fff

    .loginInner
      padding-top 60px
      width 80%
      margin 0 auto

      .login_header
        .login_logo
          font-size 40px
          font-weight bold
          color #02a774
          text-align center

        .login_header_title
          padding-top 40px
          display flex
          justify-content center

          > a
            color #333
            font-size 14px
            padding-bottom 4px

            &:first-child
              margin-right 40px

            &.on
              color #02a774
              font-weight 700
              border-bottom 2px solid #02a774

      .login_content
        > form
          > div
            display none

            &.on
              display block

            input
              width 100%
              height 100%
              padding-left 10px
              box-sizing border-box
              border 1px solid #ddd
              border-radius 4px
              outline 0
              font 400 14px Arial

              &:focus
                border 1px solid #02a774

            .login_message
              position relative
              margin-top 16px
              height 48px
              font-size 14px
              background #fff

              .get_verification
                position absolute
                top 50%
                right 10px
                transform translateY(-50%)
                border 0
                color #ccc
                font-size 14px
                background transparent

                &.right_phone
                  color black

            .login_verification
              position relative
              margin-top 16px
              height 48px
              font-size 14px
              background #fff

              .switch_button
                font-size 12px
                border 1px solid #ddd
                border-radius 8px
                transition background-color .3s, border-color .3s
                padding 0 6px
                width 30px
                height 16px
                line-height 16px
                color #fff
                position absolute
                top 50%
                right 10px
                transform translateY(-50%)
                box-sizing content-box

                &.off
                  background #fff

                  .switch_text
                    float right
                    color #ddd

                &.on
                  background #02a774

                > .switch_circle
                  position absolute
                  top -1px
                  left -1px
                  width 16px
                  height 16px
                  border 1px solid #ddd
                  border-radius 50%
                  background #fff
                  box-shadow 0 2px 4px 0 rgba(0, 0, 0, .1)
                  transition transform .3s

                  &.right
                    transform translateX(30px)

            .login_hint
              margin-top 12px
              color #999
              font-size 14px
              line-height 20px

              > a
                color #02a774

          .login_submit
            display block
            width 100%
            height 42px
            margin-top 30px
            border-radius 4px
            background #4cd96f
            color #fff
            text-align center
            font-size 16px
            line-height 42px
            border 0

        .about_us
          display block
          font-size 12px
          margin-top 20px
          text-align center
          color #999

      .go_back
        position absolute
        top 5px
        left 5px
        width 30px
        height 30px

        > .iconfont
          font-size 20px
          color #999
</style>
